/*
 * Copyright © 2016-2024 The Thingsboard Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
const CompressionPlugin = require("compression-webpack-plugin");
const JavaScriptOptimizerPlugin = require("@angular-devkit/build-angular/src/webpack/plugins/javascript-optimizer-plugin").JavaScriptOptimizerPlugin;
const webpack = require("webpack");
const dirTree = require("directory-tree");
const ngWebpack = require('@ngtools/webpack');
const keysTransformer = require('ts-transformer-keys/transformer').default;

var langs = [];

dirTree("./src/assets/locale/", {extensions: /\.json$/}, (item) => {
    /* It is expected what the name of a locale file has the following format: */
    /* 'locale.constant-LANG_CODE[_REGION_CODE].json', e.g. locale.constant-es.json or locale.constant-zh_CN.json*/
    langs.push(item.name.slice(item.name.lastIndexOf("-") + 1, -5));
});

module.exports = (config, options) => {

    config.ignoreWarnings.push(/Usage of '~' in imports is deprecated/);
    config.ignoreWarnings.push(/Did you mean "left" instead?/);
    config.ignoreWarnings.push(/autoprefixer/);

    config.plugins.push(
        new webpack.DefinePlugin({
            TBMQ_VERSION: JSON.stringify(require("./package.json").version),
            SUPPORTED_LANGS: JSON.stringify(langs),
        })
    );
    config.plugins.push(
        new webpack.ProvidePlugin(
            {
                $: "jquery"
            }
        )
    );
    config.plugins.push(
        new CompressionPlugin({
            filename: "[path][base].gz[query]",
            algorithm: "gzip",
            test: /\.js$|\.css$|\.html$|\.svg?.+$|\.jpg$|\.ttf?.+$|\.woff?.+$|\.eot?.+$|\.json$/,
            threshold: 10240,
            minRatio: 0.8,
            deleteOriginalAssets: false,
        })
    );
    config.plugins.push(
        new webpack.IgnorePlugin({
            resourceRegExp: /^\.\/locale$/,
            contextRegExp: /moment$/,
        })
    );

    config.module.rules[2].use[0].options.aot = false;
    const index = config.plugins.findIndex(p => p instanceof ngWebpack.AngularWebpackPlugin);
    let angularWebpackPlugin = config.plugins[index];
    if (config.mode === 'production') {
        const angularCompilerOptions = angularWebpackPlugin.pluginOptions;
        angularCompilerOptions.emitClassMetadata = true;
        angularCompilerOptions.emitNgModuleScope = true;
        config.plugins.splice(index, 1);
        angularWebpackPlugin = new ngWebpack.AngularWebpackPlugin(angularCompilerOptions);
        config.plugins.push(angularWebpackPlugin);
        const javascriptOptimizerOptions = config.optimization.minimizer[0].options;
        delete javascriptOptimizerOptions.define.ngJitMode;
        config.optimization.minimizer.splice(0, 1);
        config.optimization.minimizer.unshift(new JavaScriptOptimizerPlugin(javascriptOptimizerOptions));
    }

    addTransformerToAngularWebpackPlugin(angularWebpackPlugin, keysTransformer);

    return config;
};

function addTransformerToAngularWebpackPlugin(plugin, transformer) {
    const originalCreateFileEmitter = plugin.createFileEmitter; // private method
    plugin.createFileEmitter = function (program, transformers, getExtraDependencies, onAfterEmit) {
        if (!transformers) {
            transformers = {};
        }
        if (!transformers.before) {
            transformers = { before: [] };
        }
        transformers.before.push(transformer(program.getProgram()));
        return originalCreateFileEmitter.apply(plugin, [program, transformers, getExtraDependencies, onAfterEmit]);
    };
}
